The flight of the bumblebee was discussed here a while back also. The bumblebees can't fly bit was a joke that knuckle heads did not get. Folks who can't think much still use it to support their beliefs. The physics of the flight of bumblebees has been understood for more than one hundred years if I remember correctly.
There is plenty of stuff that is not understood but the physics of the flight of a bumblebee is well understood.